Per AppleInsider, Apple is said to be planning to offer customers more choices with the launch of its next-generation iPhone, including multiple colors and sizes, with an earlier-than-expected debut in the May-June timeframe.

Analyst Brian White of Topeka Capital Markets said in a note to investors Wednesday that his checks within the industry have indicated the so-called “iPhone 5S” will come in a variety of colors beyond the current black and white. He expects that the next iPhone will be available in a total of eight colors: the pink, yellow, blue, green, purple, silver and slate shades currently found on the iPod nano, and a (Product)Red model with proceeds benefiting AIDS research.

Beyond the new colors, White also said his industry checks found that a new model could become available in multiple screen sizes. Apple currently sells the 4-inch iPhone 5 alongside the 3.5-inch iPhone 4S and iPhone 4, but the company has never offered multiple screen sizes for a single model.

“We believe this is about to change with the next iPhone offering different screen sizes that we believe will allow Apple to better bifurcate the market and expand its reach,” White said. “This eventually opens up the possibility for a lower-priced iPhone (i.e., iPhone mini) with a smaller screen size that could allow Apple to further penetrate markets such as China and open up opportunities in India.”

The possibility of different iPhone screen sizes also opens up the opportunity for Apple to build a handset with a larger display. Apple’s chief rival, Samsung, has found some success in the market with its Galaxy Note series, which features a 5.5-inch screen with its latest model.

The launch of the iPhone 5 in September marked the first time that Apple has changed the screen size of the iPhone. The new 4-inch screen is slightly taller than the previous 3.5-inch screen, but remains the same width, allowing the handset to be operated with one hand.

As for new colors, White expects that expanded options will also eventually come to the iPad lineup, though no timeframe was given. The iPad mini launched in late October with design cues borrowed from the redesigned iPhone 5 and iPod touch, including an anodized aluminum back, but the device lacks the array of color options found in the iPod touch lineup.